46results about How to "Maintain structural stability" patented technology

A sliding bearing arrangement for a wind turbine and a method to service the bearing is provided. A sliding bearing arrangement of a wind turbine includes a first shaft and a second shaft, whereby a first radial sliding bearing is arranged between the shafts. The first radial sliding bearing includes bearing pads. The first shaft includes a collar, whereby the collar is arranged mainly perpendicular to the axis of rotation, and radially overlaps at least a part of a radial surface of the second shaft. The collar includes an opening to exchange the bearing pads of the first radial sliding bearing of the bearing arrangement.

A method of manufacturing a tube-plate structure of metal-matrix composite material in which a single mold is used having a first fiber preform of shape comparable to that of the tube, a second fiber preform of shape comparable to that of the plate, and a third fiber preform surrounding the first fiber preform where it is adjacent to the second fiber preform all placed therein. Thereafter, a metal or a metal alloy is injected into the mold along the axis of the tube via the face of the second preform that is remote from the first preform. This provides a monolithic structure that presents a high degree of thermo-mechanical stability.

A prosthesis for implantation in a de-nucleated intervertebral disc includes a fiber ring-like layer which encloses a polymeric layer to create an annular space. The annular space is inflatable with an in-situ curable liquid polymer and forms an interior cavity. The annular space may be expanded uniformly or differentially to be tailored to the needs of a particular vertebral segment and to achieve optimal disc space width and angle, thereby stabilizing the segment while preserving normal motion of the vertebral segment. The interior cavity provides a void that allows inward deformation of the implant during weight bearing activities and bending. The prosthesis can be elastically deformed through axial elongation to a reduced profile to load into a delivery cannula using pulling techniques.

The invention relates to a sulfonated dihydroxypropyl chitosan modified polysulfone (SDHPCS-PSF) membrane and a preparation method thereof. The preparation method comprises the steps of anchoring 2,4-dihydroxybenzophenone (2,4-DHBP) onto the surface of a polysulfone (PSF) membrane, used as a base membrane, by means of ultraviolet grafting so as to obtain a hydroxylated PSF base membrane; graftingvinyl glycidyl ether onto the surface of the hydroxylated PSF base membrane by means of an etherification reaction so as to obtain a vinylated PSF base membrane; finally, grafting sulfonated dihydroxypropyl chitosan (SDHPCS) onto the surface of the vinylated PSF base membrane by means of a Michael addition reaction so as to obtain the SDHPCS-PSF membrane. The preparation method has the characteristic that the surface of the PSF membrane contains SDHPCS-PSF, so that the hydrophilia and anticoagulant activity of the membrane surface are improved; furthermore, the method is simple in process, andmild and controllable in reaction conditions.

The invention provides the application of a DNA tetrahedron nanostructure as a carrier of inner ear disease medicine; wherein, the DNA tetrahedron nanostructure reaches functional cells of the inner ear through injection through a round window. In the present invention, it is successfully confirmed that the DNA tetrahedral nanostructure can enter the functional cells of the inner ear through the mouse round window drug delivery technique. Therefore, for the first time, the present invention realizes the enrichment of the hearing hair cells of the inner ear with the DNA tetrahedron nanostructure, and provides a new way for delivering drugs for inner ear diseases. At the same time, nucleic acid molecules naturally have the advantages of low toxicity, excellent biocompatibility, etc., and the synthesis of framework nucleic acids is cheap (the cost of each injection is about a few yuan), so the DNA tetrahedron nanostructure provided by the present invention is ideal for treating inner ear diseases. ideal drug carrier.

The invention discloses a method for designing and arranging hole decorative plates based on circle stacks, which includes the following steps: (1) importing a customized image, adjusting the size of the image according to the customized style, and converting it into a grayscale image; (2) converting the image to grayscale Segment the final image, obtain the core image area, and leave the background image blank; (3) Calculate the circle radius range corresponding to the punch aperture standard series according to the characteristics of the circle pile and combined with different mechanical structure requirements; (4) ) Calculate the geometric center of the foreground image and use it as the starting point; (5) Establish a polar coordinate system with the starting point in step (4), obtain the shaft diameter from the maximum distance, and find the next point; (6) Calculate the polar angle rotation from the distance (7) Adjust the coordinates of this point; (8) Repeat steps (6) and (7) to complete the filling of the area and boundary; (9) Statistics, generate processing technology information, and The processing technology information is used for processing by a numerical control machine tool; the present invention uses the characteristics of the circle pile and combines the polar coordinate point method to realize the design and arrangement method of the artistic punching decorative board with randomness, so as to ensure the structural rigidity and While improving the stability, the visual artistic effect of the board is improved.